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參數(shù)資料
| 型號： | BUF20820 |
| 英文描述： | 18-Channel GAMMA VOLTAGE GENERATOR with Two Programmable VCOM Channels |
| 中文描述： | 18通道伽瑪雙通道可編程的VCOM電壓發(fā)生器 |
| 文件頁數(shù)： | 16/32頁 |
| 文件大?。?/td> | 1826K |
| 代理商： | BUF20820 |
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SBOS330C DECEMBER 2005 REVISED OCTOBER 2006
www.ti.com
16
REPLACEMENT OF TRADITIONAL GAMMA
BUFFER
Traditional gamma buffers rely on a resistor string (often
using expensive 0.1% resistors) to set the gamma
voltages. During development, the optimization of these
gamma voltages can be time consuming. Programming
these gamma voltages with the BUF20820 can
significantly reduce the time required for gamma voltage
optimization. The final gamma values can be written into
the internal OTP memory to replace a traditional gamma
buffer solution. Figure 13a shows the traditional resistor
string; Figure 13b shows the more efficient alternative
method using the BUF20820.
The BUF20820 uses the most advanced high-voltage
CMOS process available today, which allows it to be
competitive with traditional gamma buffers.
Programmability offers the following advantages:
It shortens development time significantly.
It eliminates manufacturing variance between panels.
It allows a single panel to be built for multiple
customers, with loading of customer-dependent
gamma curves during final production. This
significantly lowers inventory cost and risk and
simplifies inventory management.
It allows demonstration of various gamma curves to
LCD monitor makers by simply uploading a different
set of gamma values.
It provides a simple means of adjusting gamma curves
during final production improve picture quality and
accommodate changes in the panel manufacturing
process or end-customer requirements.
It decreases cost and space.
BUFxx704
a) Traditional
b)
BUF20820
Solution
PC
SDA
SCL
SDA
SCL
Timing
Controller
LCD Panel Electronics
BUF20820
R
Control Interface
Gamma
References
OUT1
OUT2
OUT17
OUT18
V
COM
V
COM OUT1
V
COM OUT2
Figure 13. Replacement of the Traditional Gamma Buffer
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| BUF20820AIDCPR | 18-Channel GAMMA VOLTAGE GENERATOR with Two Programmable VCOM Channels |
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| BUF298AF | TRANSISTOR | BJT POWER MODULE | INDEPENDENT | 450V V(BR)CEO | 50A I(C) |
| BUF298AV | TRANSISTOR | BJT POWER MODULE | INDEPENDENT | 450V V(BR)CEO | 50A I(C) |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| BUF20820AIDCPR | 功能描述:LCD Gamma緩沖器 18-Ch Vltg Generator w/2 Prog VCOM Chs RoHS:否 制造商:Maxim Integrated 輸入補償電壓: 轉(zhuǎn)換速度: 電源電壓-最大:20 V 電源電壓-最小:9 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-38 封裝:Tube |
| BUF20820AIDCPRE4 | 功能描述:LCD Gamma緩沖器 18-Ch Vltg Generator w/2 Prog VCOM Chs RoHS:否 制造商:Maxim Integrated 輸入補償電壓: 轉(zhuǎn)換速度: 電源電壓-最大:20 V 電源電壓-最小:9 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-38 封裝:Tube |
| BUF20820EVM | 功能描述:放大器 IC 開發(fā)工具 BUF20800-BUF20820 Eval Mod RoHS:否 制造商:International Rectifier 產(chǎn)品:Demonstration Boards 類型:Power Amplifiers 工具用于評估:IR4302 工作電源電壓:13 V to 23 V |
| BUF22821 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Programmable Gamma-Voltage Generator and VCOM Calibrator with Integrated Two-Bank Memory |
| BUF22821AIDCPR | 功能描述:LCD Gamma緩沖器 Prgrmbl Gam-Vltg Gen & Vcom Calibrator RoHS:否 制造商:Maxim Integrated 輸入補償電壓: 轉(zhuǎn)換速度: 電源電壓-最大:20 V 電源電壓-最小:9 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-38 封裝:Tube |
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